Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1724signal for immobilizer, short circuit to ground
P172400Control Module Malfunctioning, Sporadic
Manufacturer communications
7Original wording in English
AUDI
Supersedes Technical Service Bulletin Group 35 number 13-11 dated June 11, 2013. One or multiple transmission-related concerns may be present. Harsh downshifting of multiple gears: 7-5, 4-3, 2-1. This may happen during just one of these shifts. A bump is felt after vehicle comes to a stop (2-1 downshift). Fluctuating engine spee…
AUDI
Drivability concerns or P1724 fault stored S-Tronic Transmission.
AUDI
Supersedes Technical Service Bulletin Group 35 number 11-02 dated November 8, 2011. Harsh downshifting multiple gears 7-5, 4-3, 2-1. This may happen during just one of these shifts. A bump felt after coming to a stop (2-1 down shift). Fluctuating engine speed after 5-4 shift with accelerator at 80-100% accelerator pedal position…
AUDI
Customer may report transmission warning light comes on. No drivability/starting concerns. GFF scan shows DTC P172400 (Control Module Malfunctioning, Sporadic), stored in the transmission control module (TCM), J217 (02). DTC 00165 (Transmission Park/Neutral Position Switch -F322- Incorrect Signal Sporadic) may also be stored in …
Check vehicle applicability
11A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A4 ↗ | 2013 |
| Audi | A4 ALLROAD ↗ | 2013 |
| Audi | A5 ↗ | 2013 |
| Audi | A5 ↗ | 2012 |
| Audi | A5 CABRIOLET ↗ | 2013 |
| Audi | A6 ↗ | 2013 |
| Audi | A6 ↗ | 2012 |
| Audi | S4 ↗ | 2011 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Gear 4 Incorrect Ratio
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.